An episode of reinflation of the Long Valley Caldera, eastern California: 1989-1991
Journal of Geophysical Research
By: J. Langbein, D. P. Hill, T.N. Parker, and S.K. Wilkinson
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Abstract
Following the episodes of inflation of the resurgent dome associated with the May 1980 earthquake sequence (four M 6 earthquakes) and the January 1983 earthquake swarm (two M 5.2 events), 7 years of frequently repeated two-color geodimeter measurements spanning the Long Valley caldera document gradually decreasing extensional strain rates from 5 ppm/yr in mid-1983, when the measurements began, to near zero in mid-1989. Early October 1989 marked a change in activity when measurements of the two-color geodimeter network showed a significant increase in extensional strain rate (9 ppm/yr) across the caldera. The seismic activity began exceeding 10 M ??? 1..2 per week in early December 1989 and rapidly increased to a sustained level of tens of M ??? 1.2 per week with bursts having hundreds of events per day. The episode of inflation can be modeled by a single Mogi point source located about 7 km beneath the center of the resurgent dome. -from Authors
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | An episode of reinflation of the Long Valley Caldera, eastern California: 1989-1991 |
| Series title | Journal of Geophysical Research |
| Volume | 98 |
| Issue | B9 |
| Year Published | 1993 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Geophysical Research |
| Google Analytic Metrics | Metrics page |